Telautograph.



PATENTED APR. 23, 1907.

A. KORN.

TELAUTOGRAPH.

APPLIOATION FILED JAN. 25.1907.

4 SHEETS-SHEET 1.

ammal'o z PATENTED APR. 28, 1907.

A. KORN.

TELAUTOGRAPH.

APPLIOATION FILED JAN.25.1907.

4 SHEETS-SHEET 2.

\HHH ll HI Hill Ill Illlll No. 851,174. PATENTED APR. 23, 1907.

A. KORN.

TELAUTOGRAPH.

APPLICATION FILED JAN.25,1907.

4 SHEETS-SHEET 3.

. mu m w w Q Mm m & m m 1 -1 F \H/VFH hw il 3 3 3 5 E a 8 um i E E Wm mm 3 mm 3 W W W w mT/ PATENTED APR. 23, 1907.

A. KORN.

TELAUTOGRAPH.

APPLICATION TILED JAN.25,1907.

4 SHEETS'SHEET 4.

min Ni :My invention re ates to improvements in" .vented a new an UN TED STATES: PATENT- mm; ,1 KOIWEB,GERMANY. uT e PH. l

i no. 861,174.

"zen of the Em ire of Germany, residing at Munich, in the m ire of Germany, have inwhich-the followin is a specification.

telautogra hic systems,'whereby the speed in the pro uction at the receiving station of a copy of an original at the sending station is considerably increased.

same, seen from right to left'in The chief improvement consists in the employment at the receiving station of a galvanometer with an intercepter on one or two parallel metallic strings as conductors for controlling a ray of light acting upon a sensitive film or the like.

I will now roceed to describe my invention with ref rence to drawings, in which A Figure 1 is a vertical longitudinal section through agalvanometer with 'an intercepter on two parallel metallic strings on the line ,.EF in Fig. 2, Fig. 2 isa horizontal section through the same on the line AB in Fig.1, Fig. 3 is aside view of the lower part of the 1, Fi 4 is a vertical cross section throug the e CD in Fig. 1, the metallic strings occupying their upper extreme osition, Fig. 5 is a similar cross section, t e metallic strings occupying their lower extreme osition, Fig. 6 is a plan of. a receiver, parts being shown in section, Fi 7 is a plan of a sender, Fig. 8 is a diagram 0 atelautographic system, Fig. 9 is a diagram of a modifie telauto aphic system, Fig. 10 is a vertical lon itu inal section on the hue GH in Fig. 11 t ough part of a galvanometer with an intercepter ona single metallic string serving as a conductor, Flg. 11 is a horizontal section through the same on the line 'IJin Fig. 10, and Fig. 12 is a diagram of a'simplified telautographic system.

7 Similar characters of reference refer to, similar I re erably emp oya galvanometer,which isil ustrated in Figs. 1 to- 5.

arts throu hout the several views.

1 denotes a horseshoe magnet, the poles of which arefpro- Qvid'ed with two opposite cross holes 2, 2 in the same central line. Between the two ole's of the ma net 1 a rectangular frame 3 o timber or the ike and ofany suitable knownconstruction is disposed and secured in any known manner, for example by means of screws 4, 4. A metallic strap 5 is fastened Specification of Lettera Patent. 7

Application filed Jaimary 26,1907. 8014:1110. 854,082.

useful Telautograph,/of

the accompanying on the'left short side (Figs. 1 and 2) of the.

frame 3 and is provided with a horizontal cross pin 6 within and with a suitable binding post 7 without. A longitudinall bored metallic 'iece 8 is fastened on the rig t short Patented April 23,1907.

side of t e frame 3 and is provided with a binding post 9. Amovable metallic strap" 10 is'drsposed within the frame 3 and is guided between suitable pieces 11, 11 of timber or the like. 'It is provided 'with a horizontal cross pin-12 and a screw threaded shank 13,

which latter is guided in the bore of the piece 8 and can be longitudinally shiftedby means I of a winged nut 14. A thin doubled metallic wire 15, 16 is passed round the pin 6 and its two ends-are soldered or otherwise fastened on the other pin 12. The two pins 6 and 12 having thesame diameter, it will be understood that the two wires 15 and 16 will be parallel to each other. The two wires 15 and 16 are to serve as conductors. A thin little plate 17 impermeable to light, say

of aluminium or other opa ue material, is sticked to the two wires 15 an 16 in'the vertical central plane ofthe two holes 2, 2 and serves as an intercepter as will be hereinafter described. By means of the winged nut 14 the two wires 15 and 16 can be more or less and uniformly tightened. When an electric current of a sufficient strength passes through the two conductors 15 and 16 in one direction, say

from the line 19 to the line 18, the aluminium plate or intercepter 17 will be shifted upward into an extreme upper position as is shown in Fig. 4. On the other hand, if the electric current passes through the two conductors 15 and 16 in the opposite direction, say from the line 18,to the l ne 19, the aluminium plate or intercepter 17 will be shifted downwards into an extreme lower osition as is shown in 5. By means of t e winged nut 14 it is possible to so adjust the tension of the two wires 15 and 16 with regard to the strength of the current, that the two extreme positions of the aluminium plate or intercepter 17 shall.

beat a certain verticaldistance from each other, as will be hereinafter described. For attaining this object it may be 1 that the strength of the current passing in the one direction requires to be larger than that of' the opposite current. This will have to be ascertained by trials. The conductors 15 and 16 may also be metallic threads or thin and narrow metallic strips or ribbons.

The galvanometer described I employ at a acting upon a sensitive film or the l is such, that the platen-roll 22 with the gear wheel 23 is longitudinally shifted through a minute distance during every revolution. The box 20 may be connected with a casing or frame 25, in which a clockwork of any known construction is disposed. InFig; 6 this clockwork is shown as comprising a spring barrel 26 loose on a winding shaft 27 and idly connected with a gear wheel 28, which 1s adapted to drive the long pinion 24 by means of its shaft and a pinion 29 and also a fly 30 4 support or feet (not shown).

b means of its shaft 31, a'pinion 32, a-gear wlreel33, its shaft 34 and a pinion 35. A ratchet wheel 36 is fastened on the winding shaft 27 and is checked by a springres'sed pawl 37. It will be understood, t at by means of a key put on the square 27 of the win shaft 27 the spring within the barrel 26 can wound up and that on the fly 30 being released by some known means (not shown) the clockwork will be ut in motion to drive the platen-roll 22 whlch will rotate and will be gradually shifted on the screwspindle 21 in its longitudinal direction.

At a convenient distance from the box 20 the galvanometer above described is disposed on some base (not shown). Between this galvanometer and the box 20 a tube 38 of any known construction is placed on some The tube 38 ma have a conical tubular end piece 39,

' which is embedded in a suitable boss 40 on the box 20 and is provided with a bottom. In the middle of this bottom a fine hole 41 is made. The tube 38 is provided with two lenses 42 and 43 of any known construction, either simple or compound, and ma have a bottom with ,a hole 44 of about t e same diameter as the holes 2, 2 in the poles of the horseshoe magnet 1. On the other side of the latter another tube 45 of any known construction is disposed in line wit the tube 38 and on some support or feet placed on the said base.- The tube 45 contains some frame 3 and the other hole 2. After their passage through the focus 49 (Fig. 5) the the httle aluminium plate or interceptor 17 in its-one extreme'position, say the lowermost position in Fig. 5, will permit the ra s of light to pass freely from the left to t e right in Fig. 6, while in its other extreme position, say the uppermost position, the ittle aluminium lplate 17 will intercept the conve penc' of rays of light, as is shown in 4, the rays of light being in both cases lndicated by the dotted lines. The focus 49 may also be somewhere near the little aluminium plate or interceptor 17, the only condition being, that the latter be able in its one extreme position to intercept and in its other extreme position to permit the rays of light to pass. The lens 42 maybe so arranged as to produce on the third lens 43 a real im e of the aluminium plate or intercepter 17 in its uppermost position. In this case of course no light will pass through the lens 43 and the camera obscura formed by the conical piece 39. If the aluminium plate or interceptor 17 occupies its lowermost position shown in Fi 5, of course the lens 43 will be fully lighte so that a ray of light (indicated by the dotted line in Fig. 6) will pass through the fine hole 41 and will strike the platen roll 22. A sensitive film 50 or paper or the like is placed round the cylinder 22 and is fastened thereon in any known manner and it will be understood, that the ray of light will produce an impression on this film 50 or the like. The focus of the pencil of rays of light in the camera obscura 39 may be on the circumference of the cylin der 22, as may be seen from Fig. 6, but this is not absolutel line of the two tu s 38 and 45 may be placed at right angles to the axis of the platen-roll 22 and ma be made to cut this axis. The said centra line should be so disposed with regard to the box 20, that the ray of li ht may meet every point of the sensitive film 50 or the like from its one border to its other border or nearly so during the rotation and longitudinal motion of the platen-roll 22.

At the sending station a sender of any known construction is disposed. This sender ma also be similar to the receiver above descri ed, only that the galvanometcr with the device for projecting a ray of light on the platen-roll 22 is omitted, as is shown at Fig. 7, in which similar parts are denoted by the same characters of reference as in Fig. 6. The box or casin 20 needs not be closed or impermeable to light. A writing pen 51 of necessary. The central.

mounted to rock in suitable su ports 52 on the casing 20 and is.electric a y connected with a line 53. This pen 51 is ada ted to.

press on an original 54, which is place round the laten-roll 22 and .is fastened thereon in any own manner. The original may be a manuscript or a drawing or a p1cture or a half-tone engraving, of which 'the several lines, dots, points and other features are drawn or produced with an insulating ink or the like on a metallic foil. The screw-spindle 21 is connected with a binding 0st 55, to which a line 56 canibe attached, 7 he platenroll 22 is preferably insulated from the gear wheel 23 and is electrically connected with the line 56. It Will now be understood, that when the platen-roll 22 is inserted in a circuit and put into motion the transmitting tracer 5 1 will normally close the circuit and will open the same only, when its point meets a line, dot, point or other feature of the original.

A system for connecting the two stations is diagrammatically illustrated in Fig. 8. A source of current 57 is disposed at the sending station and is connected with the sender say by the line 56 and may be connected with the receiving station on the right by a line of transmission 58. The sender may be connected with the receiving station by a line of transmission 63 and the line 53. However,

' either of the two lines oftransmission 58 a line 61.

pulses being periodically and 63 may be replaced by earth plates and the earth, as is well known; I desire it expressly to be understood, that the term electrical connections, which I employ in the following claims, may include either two wire conductors between the two stationsor a wire conductor on the one hand and the earth on the other hand between the two stations. At the receiving station an adjustable resistance 62 and a source of current 60 are disposed and are connected in series by The adjustable resistance 62 is connected with the line of transmission 63 and the source of current 60 is connected with-the line of transmission 58 by, a line 59. The line 18 of the galvanometer may be connected with the lines 58 and 59 andthe line 19 with the resistance 62. It will be seen,

i that the system forms a Wheatstone bridge in the bridge of which the conductors of the galvanometer are inserted. Means are pro vided at both stations for so controlling the two clockworks of the sender and the receiver;

respectively, that the two platen-rolls 22 and 22 are caused to move synchronously, im-

sent through the circuit of the two batteries 57 and 60. I do not show or describe any means for-synthe rays of light to I After the aboyezexplanations the\ manner of operating the system will be obvious.

As long as the transmittin tracer 51 closes the circuit, a current from oth batteries 57 and 60 will pass from the battery 57 through the line 56, the platen-roll 22, the transmitting tracer 51, the lines 53 and 63, the resistance 62, the line 61, the battery 60 and the lines-59 and 58 back to the battery 57 while at the same time a art of the current will ass through the bri ge, that is the line 19 t e two conductors 15 and 16 and the line 18. The consequence of this will be, that the little aluminium plate or intercepter 17 will occupy its uppermost position (Fig. 4) and intercept the pencil of rays of light, so that no ray of light is permitted to act upon the sensitive film 50 or' the like. The moment, however, the transmitting tracer 51 at the sending station comes in contact with some insulating line, dot, point or other feature of the original 54, it will break the circuit of the batte .57, so that a currentfrom the battery 60 a one will pass through the lines 59 and 18, the two conductors 15 and 16, the line 19, the resistance 62 and the line 61 back to the battery 60. g The consequence ofv this will be, that the little aluminium plate or intercepter 17 will be shifted into its lowermost position (Fig. 5) and will permit 9 5 pass to the lenses 42 and 43, so that a ray 0 light will pass through the .fine hole 41 and act upon the sensitive film 50 or the like. When the transmitting tracer 51 again closes the circuitof the battery 57, the little aluminium plate or intercepter 17 will return to its uppermost position and intercept the rays of llght.

The system illustrated in Fig. 8 may be modified in, that at the receiving station the source of current 60 is replaced by a small one 64 inserted in the bridge, as is shown at Fi 9. The operation of the galvanometer wi l in this case be much the same as before. When the transmitting tracer 51 at the sending station closes the circuit of the battery 57 a current will pass from the latter throu h the line 56, the platen-roll 22, the transmitting tracer 51, the lines 53 and 63, the resistance 62 and the lines 61 and .58 back to the battery 57, while at the same time a part of the current will pass from the resistance 62 through the line 19, the-two conductors 15 and 16, the battery 64 and the line 18 to the line '58 while counteracting the electromotive force of the battery 64. The consequence of this will be, that the little alu-' minium plate or intercepter 17 will be kept in its uppermost position (Fig. 4) and will intercept the rays oflight from the source 46. The moment the transmittin tracer 51 comes in contact with some insu ating line, dot, point or other feature of the original 54, it will break the circuit of the battery 57 so that the circuit of the small battery 64 at I tion is obtained, which s 'lhena current will pass from the battery 64 1 through the two conductors 15,and 16, the

stops to which it might stick.

' "an 16 in Fig. 1 may be replaced by a sing line 19, the resistance 62 and the lines 61 and 18 back to the battery 64; The uence ofthis will be, that the little aluminium plate orintercepter 17 will be shifted into its lowermost tion (Fig. 5) and, will permit the rays ttopasatothelens43,sothat arayof tpassingthrough'thefinehole 41 will act upon the sensitive fihn 5.0 or the The sion of the ray of light on the sensitive film' 50 or the like can developed produced by impresin manner..

. The galvanometer both directions is minimal and is checked in its motion 'merely lay the tension of the two metallic-strings an not at all b erehy it is rendered possible'to exert in the two metallic s 15 and 16 a dynamic force for exceeding t e directing force of the strings. In fact the d as to ren er-the directing orce of the s 15 and 16 insignificant m proportion to it.

Thereby an exceedingly speed in theproduction of the image at t e receiving staonly depends on the speed of the variations of the current. The galvanometer may varied in many ts. For example the two strmgs' 115 e thin metallic strip or ribbon 65, from which the little aluminium plate or intercepter 17 is suspended, as is shown at Figs. 10 and 11. In Fig. 10 the lower extreme position of the interce ter-17 and the conductor 65 is shown in full ines, while their up extreme position is indicated by dotte lines. The two ends of the metallic strip 65 may be fastened in slits of two rods 66 and 67 respectively byscrew-thread 70. The collar 68 may bearainst a metallic plate 72 on the inside of o frame 3 and the square part 69 may eni in a square hole in the plate 72 to revent the rod 66 from turning. The r 66 may be secured in the frame 3 by means of av nut 71 on its screw-threaded end 7 0.- The nut 71 may 'be rigidly connected with a binding post 73 by means of an arm and the binding post 73 may be connected with the line 19 mentioned above. The rod 67 on the right in F' 10 may have a square collar 74, which may fiie guided between two parallel lates 75, 75 in the frame 3, so as to prevent t e rod 67 from turning. Otherwise the construction of the galvanometer is the same as before. It is immaterial, what shape the intercepter 17 is given.- It may be a hollow the of the kind described above is suitable for -thetelau-' means of.

amic force. ma be made so great- .mas'softhe'interoep asminimalas rareason-that they be better able'to'hold horseshoe t 1.

the sensitive m, Pap r and the hke may be varied inmany respects and'l do not-limit myself.to;the construction ahown'and de- Where "so preferred, the 'telautographic system in Fig. 8 may be simplified by omitting'the batteryfiO and the 59 and 61' as is-shown at ig. 12. In this case the galvanometer require to be so arthat its intercepter 17 normally. occupies its. lowermost position'and is shifted upward only if a current passes thro h its single conductor 65 or its two paralle conductors l5 and 16. If the o on the platen-roll 22 at the sending station be made .as before, that is to say, if it be a manuscript or a drawing or a picture or a half-tone engraving, of which the several lines, 'dots, points and other/features'are drawn or produced with anink or the like, on a metallic foil of course the transmitting tracer 51 normally close the circuit, so that the intercepter 17 will occupy its upper- -most ition and intercept the rays of hght (see' ig. 4). The moment the transmitting tracer 51 comes incontact with some insulating line, dot, point-or other feature of the original 54, it will break the circuit, so that the conductor 65 or conductors 15 and 16 'will be without current and will drop,-whereupon the intercepter 17 will permit the rays 0 light to pass to the lens'43, so that a re of light-passing through the fine hole 41 act upon the sensitive film 50 or the like. However, I prefer to emplo either of the two tems illustrated in igs. 8-and 9 in 0 position to the simplified system shown in ilvidently the galvanometermay be so arranged-,thatthe central line of the two tubes 38 and 45. passes through the intercepter 17 in that of its two extreme positions, in which it permits the rays of light to pass from the source 46 to the lens 43, so that 'normall a ray of light will act upon the sensitive m, paper or thelike, as long as the circuit 57, 56, 22, 51, 53, 63, 62, 61, 60, 59 and 58 in Fig. 8 or the circuit 57, 56, 22, 51, 53, 63,62, 61 and 58 in Fig. 9 or the circuit 57, 56, 22, 51, 53, ,63, 62, 19, 15 and 16 or 65, 18 and 58 in Fig. 12 is closed. Only if the circuit is broken, theintercepter 1-7 will intercept the re s of light. The result will be a negative p otograph of the original. For the system .the little plate 17ml to the legs'of-the' The device or projecting a ray of light on single conductorv shown in Fig. 10 for the shown in Fig. 12 the central line of the tubes 38 and 45 would in this case require to pass through the intercepter 17 in its lowermost normalposition in Fig. 10, which means that the frame 3 would re uire to be shifted upward through such a tance, that the said central line passes through the centers of the two cross holes 2, 2 in the poles of the horseshoe magnet 1.

I claim:

1. In a telautographic system, the combination with a transmitting tracer and its platen-roll, of a receiving laten-roll, a device for projectin a ray of light on said receiving platen-r01 a galvanometer comprising a horseshoe magnet, a frame between the poles of said horseshoe magnet, a conductor stretched therein and an intercepter on the middle of the conductor, said intercepter being adapted to render said device operative and inoperative, and electrical connections between said transmittin tracer and its platen-roll on the one hand and the conductor of said galvanometer on the other hand,v

said transmitting tracer being adapted to open and to close the circuit.

2. In a telautographic system, the combination with a transmitting tracer and its platen-roll, of a receiving laten-roll, a device for rojectin a ray of light on said receiving p aten-ro a galvanometer comprisin a horseshoe ma et, a frame between the 0 es of said horse i oe magnet, a conductor stretched therein and an intercepter on the middle of the conductor, said intercepter bemg adapted to render said device operative and inoperative, and electrical connections between said transmitting tracer and its serted, said transmitt' platen-roll on the one hand and the receiving station on the other hand and forming a Wheatston bridge, in the bridge of WlllGll the conductor of said galvanometer is intracer being adapt-.

ed to open and to close t e circuit.

3Q In a telautographic system, the combination with a transmitting tracer and its platen-roll, of a'receivingplaten-roll, a device for rojectinlg I a ray of light on said receiving p aten-ro a galvanometer comprising a horseshoe magnet, a frame between the poles of said horseshoe magnet, a conductor stretched therein and an intercepter on the middle of the conductor, said intercepter be-. ing adapted to render said device operative and inoperative, a circuit including the conductor of said galvanometer, and electrical connections between said transmitting tracer and'its platen-roll on the one hand and said circuit on the other hand, stone bridge is formed, in the bridge of which the conductor of said galvanometer is inserted, said transmittin tracer being adapted to open and to close t e circuit.

4. In a telautographic system, the combination with a transmitting tracer and its platen-roll, of a receiving platen-roll, a horseshoe magnet two poles, a frame between the poles of said horseshoe magnet at right angles to its cross holes, a conductor stretched in said frame and provided in its middle with an intercepter, means for regulating the tension of said conductor, means for projecting rays of light ma et toward said receivin platen-roll, sai intercepter being adapte to intercept in its one extreme position and to pernut in its other extreme position the raysof light ass, means for permitting of the rays of light only a single'one to strike said receiving platen-roll a circuit including said conductor, and electrical connections beroll on the one hand and said circuit on the other hand, whereby a Wheatstone bridge is formed, in the bridge of which said conductor is located, said transmitting tracer beingadapted to open and to close the general circuit.

. ARTHUR KORN. Witnesses: 7

AB SoHLnsmeEB, Louis MUEL ER.

whereby a Wheattween said transmitting tracer and its platen- 

